/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2022 - Raw Material Software Limited

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 7 End-User License
   Agreement and JUCE Privacy Policy.

   End User License Agreement: www.juce.com/juce-7-licence
   Privacy Policy: www.juce.com/juce-privacy-policy

   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

//==============================================================================
// This byte-code is generated from:
//
// native/java/com/rmsl/juce/MediaControllerCallback.java
// native/java/com/rmsl/juce/MediaSessionCallback.java
// native/java/com/rmsl/juce/SystemVolumeObserver.java
//
// files with min sdk version 21
// See juce_core/native/java/README.txt on how to generate this byte-code.
static const uint8 MediaSessionByteCode[] =
{ 31,139,8,8,247,108,161,94,0,3,77,101,100,105,97,83,101,115,115,105,111,110,66,121,116,101,67,111,100,101,46,100,101,120,0,149,
152,127,108,28,71,21,199,223,236,253,180,207,190,95,254,221,186,169,211,56,137,19,234,220,145,26,226,228,28,99,199,216,196,233,
249,71,125,182,107,76,168,187,246,109,236,77,238,118,143,221,189,171,45,132,168,170,32,21,209,63,144,74,165,170,82,81,144,64,
128,20,36,74,37,132,80,69,35,126,75,32,160,82,36,130,64,80,16,8,138,42,126,41,17,21,164,130,239,204,206,158,239,46,14,42,151,
124,246,189,121,239,205,236,155,55,51,231,219,205,107,219,205,233,135,222,67,219,115,149,223,125,253,83,63,120,252,139,71,187,
47,68,78,252,118,237,250,194,183,191,251,151,175,254,243,214,229,4,81,137,136,182,151,135,146,36,63,215,226,68,27,228,218,187,
192,109,230,202,21,133,40,0,89,240,17,13,64,126,6,18,255,233,186,159,104,190,133,104,8,206,199,194,68,42,200,131,2,176,192,199,
193,83,224,19,224,69,112,13,252,18,220,2,61,77,68,195,224,34,184,2,126,10,254,3,14,53,19,157,4,179,32,15,158,6,47,129,159,131,
183,65,111,132,40,13,198,65,14,60,7,94,6,63,1,111,128,55,193,223,192,45,240,47,64,200,207,15,154,64,20,180,131,110,112,31,232,
3,253,224,24,56,13,52,80,4,151,193,243,224,179,224,203,224,43,224,101,240,125,240,71,16,106,37,122,16,204,128,101,160,131,143,
130,231,193,85,240,45,240,27,240,6,120,27,132,162,68,157,224,40,56,13,166,192,44,80,193,14,248,36,120,22,188,8,94,2,175,130,
215,192,239,193,155,224,239,224,45,144,136,33,111,112,4,156,2,83,96,6,228,192,135,193,54,248,88,204,93,171,16,64,153,9,37,37,148,
141,100,41,8,233,16,134,34,132,17,182,0,241,197,111,3,237,160,3,116,202,181,239,6,61,224,30,208,11,246,131,7,65,16,40,114,191,
112,221,87,163,183,73,125,191,28,139,127,30,144,250,53,36,116,64,234,63,132,222,47,245,159,213,232,55,106,244,215,161,31,148,
250,159,160,31,150,250,77,232,135,164,126,187,70,247,135,119,245,150,26,189,29,250,17,169,247,214,216,7,194,238,94,230,122,186,
198,62,12,253,168,212,199,160,191,75,234,103,161,15,202,250,204,215,232,43,97,94,207,8,249,101,77,135,64,92,202,4,49,58,38,
235,204,219,12,255,142,139,250,197,104,69,200,8,61,46,107,248,16,241,117,139,139,218,134,96,81,196,218,185,50,130,235,154,24,
223,47,218,49,68,156,20,50,72,167,132,12,83,70,250,71,132,108,165,73,33,91,104,90,200,40,205,8,153,164,89,33,125,244,136,200,
211,29,143,203,81,41,223,39,100,19,141,9,25,160,113,105,63,35,164,143,62,32,100,7,157,149,237,115,82,62,44,100,130,178,178,61,
39,251,205,203,246,130,148,57,105,95,148,237,37,81,159,102,145,71,2,246,9,33,219,105,74,200,54,90,21,251,170,147,206,203,250,
50,114,247,54,255,236,3,95,66,227,72,220,109,199,165,191,73,250,239,151,242,131,210,159,144,254,128,180,247,73,249,5,233,231,
190,30,232,126,228,197,245,203,49,119,95,151,226,1,180,87,147,12,117,228,21,227,107,253,140,244,229,250,24,149,198,154,72,121,
247,174,239,217,58,95,115,157,239,133,58,95,68,248,20,121,162,62,23,115,115,136,138,61,193,196,190,184,90,27,159,110,33,133,69,
171,249,125,173,154,95,80,228,167,160,39,19,30,162,111,214,141,229,142,255,106,204,61,187,201,120,172,58,254,247,170,227,43,
24,191,77,140,239,249,126,84,231,107,23,190,0,60,188,126,175,213,250,22,59,196,60,188,123,255,162,230,222,65,25,255,107,47,62,
141,248,165,78,242,141,239,198,255,161,38,222,179,253,185,46,127,247,91,230,175,123,212,231,86,93,142,93,34,199,160,220,215,
255,142,185,123,33,73,165,62,110,249,208,1,31,173,246,251,69,255,128,28,53,16,119,191,3,141,120,8,189,90,232,30,150,38,163,239,
48,246,82,51,13,99,167,229,208,179,148,238,151,115,119,215,48,26,119,191,227,134,253,109,180,152,246,161,47,207,174,5,210,39,
228,58,146,76,38,141,49,70,241,227,209,61,35,12,100,155,166,129,127,80,245,195,104,119,15,243,191,167,94,91,169,147,65,41,195,
82,54,203,202,180,137,239,118,69,142,227,237,113,70,110,109,24,185,127,11,24,185,127,11,120,159,8,206,148,23,211,42,251,242,
81,120,187,93,218,59,165,189,19,209,188,237,151,246,54,98,3,196,70,40,56,162,27,186,51,74,254,209,204,145,101,138,76,204,205,
46,78,206,46,174,45,45,76,19,59,71,44,75,157,89,213,200,91,166,158,79,169,165,82,106,124,195,209,43,186,179,147,161,253,85,251,
134,105,56,154,225,164,38,92,185,160,217,102,161,162,89,25,234,217,59,100,219,201,80,247,29,174,105,33,50,244,64,213,147,87,29,
117,93,181,53,111,224,185,117,91,179,196,192,247,85,99,138,90,94,87,83,51,252,58,163,57,42,239,146,161,116,131,219,214,108,
91,55,13,55,140,15,102,153,133,130,102,245,79,168,133,194,186,186,113,41,67,67,239,176,199,124,65,221,225,61,166,141,11,102,
134,6,255,87,175,156,219,168,185,201,177,119,18,254,72,89,43,107,211,142,86,204,208,193,187,196,123,73,228,28,213,209,50,148,168,
134,25,154,147,90,178,244,12,181,85,77,166,157,58,83,54,242,5,196,181,215,26,207,170,220,104,213,150,187,100,153,21,61,175,89,
169,156,230,56,186,177,105,247,231,118,108,145,200,225,236,134,89,76,89,69,187,144,186,88,222,208,26,171,178,59,195,254,189,
2,229,204,238,30,229,222,102,217,44,148,139,90,237,26,231,213,66,69,191,148,82,13,195,196,76,249,204,115,250,166,161,58,101,
11,179,73,102,47,170,21,53,85,80,141,205,84,206,177,144,111,134,98,174,173,236,232,133,84,86,183,29,138,55,24,50,52,214,96,25,
249,255,214,100,52,67,189,119,153,253,49,62,48,245,236,53,101,233,218,107,158,174,139,45,147,178,124,142,124,203,231,196,37,75,
126,92,178,176,101,209,204,114,91,150,219,178,171,220,182,138,38,20,182,74,10,68,88,149,39,146,90,61,109,209,92,178,53,58,36,
15,214,169,20,38,229,46,104,202,22,25,164,42,34,133,181,98,217,214,55,40,136,243,104,169,54,117,108,106,206,120,169,84,208,55,
68,173,229,73,165,36,204,13,7,155,252,91,38,138,219,196,175,238,189,20,61,79,126,29,103,130,18,162,140,103,202,142,99,26,238,
137,166,251,139,245,5,27,47,231,117,147,31,160,137,45,44,158,150,167,125,13,1,222,65,246,252,7,26,252,117,251,223,11,106,188,
139,92,130,247,107,54,12,59,8,8,137,128,233,188,76,81,250,231,213,50,242,143,215,153,48,60,221,219,104,153,178,204,226,140,28,
33,89,235,204,105,218,165,69,179,126,136,156,99,150,100,70,158,165,102,237,189,148,195,69,57,81,74,154,198,29,85,9,99,13,132,
74,173,166,49,165,218,206,148,105,61,161,90,121,30,60,179,91,228,201,10,175,113,130,219,234,171,22,242,38,23,148,83,74,220,57,
145,78,215,116,71,49,163,166,33,246,124,77,46,11,218,19,186,33,52,57,225,36,215,26,106,220,2,219,37,189,180,104,206,242,173,19,
247,90,243,150,86,209,205,178,205,83,112,45,213,19,197,179,19,213,242,149,76,155,2,31,225,118,234,178,180,77,156,77,156,173,
250,47,126,106,182,181,194,5,89,21,232,206,164,161,174,23,112,223,152,189,101,150,11,249,51,154,103,104,182,29,213,114,236,71,
117,103,139,2,54,159,26,249,157,45,221,166,176,99,186,223,22,212,83,54,238,118,27,95,217,210,41,80,81,11,200,101,144,189,55,
20,29,25,164,33,54,28,138,174,210,41,54,201,197,24,123,140,139,41,70,126,182,210,177,15,15,135,15,19,55,164,101,116,142,63,47,
174,176,147,184,158,16,142,211,226,58,161,140,30,231,242,60,119,79,179,71,185,190,198,245,117,126,209,216,9,92,231,68,228,128,
146,198,72,217,193,65,58,169,172,174,135,162,223,225,99,159,15,69,7,89,60,209,75,74,146,173,247,6,186,168,235,222,46,214,21,239,
194,239,168,64,128,41,225,39,159,244,191,210,204,158,82,168,150,86,118,163,153,177,155,224,211,17,198,174,130,107,248,37,16,
140,40,74,18,241,191,138,52,198,115,186,217,91,136,123,166,133,177,43,224,21,112,3,220,4,79,183,50,246,121,240,13,240,99,240,
122,43,41,138,226,83,152,114,0,163,221,110,229,189,15,178,43,81,70,215,163,20,111,248,93,196,165,247,110,130,255,38,241,222,79,
248,104,247,29,133,159,118,223,83,112,233,189,171,240,158,83,249,251,10,95,220,29,75,252,198,234,115,159,237,70,160,7,251,92,59,
127,158,96,113,247,89,150,63,179,42,125,238,125,249,251,13,159,140,231,207,5,254,190,221,231,5,254,32,193,199,23,207,33,114,
124,254,46,229,191,60,5,16,96,132,17,0,0,0,0 };

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK)    \
 METHOD (getPlaybackInfo,      "getPlaybackInfo",      "()Landroid/media/session/MediaController$PlaybackInfo;") \
 METHOD (getPlaybackState,     "getPlaybackState",     "()Landroid/media/session/PlaybackState;") \
 METHOD (getTransportControls, "getTransportControls", "()Landroid/media/session/MediaController$TransportControls;") \
 METHOD (registerCallback,     "registerCallback",     "(Landroid/media/session/MediaController$Callback;)V") \
 METHOD (setVolumeTo,          "setVolumeTo",          "(II)V") \
 METHOD (unregisterCallback,   "unregisterCallback",   "(Landroid/media/session/MediaController$Callback;)V")

DECLARE_JNI_CLASS_WITH_MIN_SDK (AndroidMediaController, "android/media/session/MediaController", 21)
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
 METHOD (getAudioAttributes, "getAudioAttributes", "()Landroid/media/AudioAttributes;") \
 METHOD (getCurrentVolume,   "getCurrentVolume",   "()I") \
 METHOD (getMaxVolume,       "getMaxVolume",       "()I")

DECLARE_JNI_CLASS_WITH_MIN_SDK (AndroidMediaControllerPlaybackInfo, "android/media/session/MediaController$PlaybackInfo", 21)
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
 METHOD (pause,           "pause",           "()V") \
 METHOD (play,            "play",            "()V") \
 METHOD (playFromMediaId, "playFromMediaId", "(Ljava/lang/String;Landroid/os/Bundle;)V") \
 METHOD (seekTo,          "seekTo",          "(J)V") \
 METHOD (stop,            "stop",            "()V")

DECLARE_JNI_CLASS_WITH_MIN_SDK (AndroidMediaControllerTransportControls, "android/media/session/MediaController$TransportControls", 21)
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
 METHOD (constructor,                  "<init>",                       "()V") \
 METHOD (getCurrentPosition,           "getCurrentPosition",           "()I") \
 METHOD (getDuration,                  "getDuration",                  "()I") \
 METHOD (getPlaybackParams,            "getPlaybackParams",            "()Landroid/media/PlaybackParams;") \
 METHOD (getVideoHeight,               "getVideoHeight",               "()I") \
 METHOD (getVideoWidth,                "getVideoWidth",                "()I") \
 METHOD (isPlaying,                    "isPlaying",                    "()Z") \
 METHOD (pause,                        "pause",                        "()V") \
 METHOD (prepareAsync,                 "prepareAsync",                 "()V") \
 METHOD (release,                      "release",                      "()V") \
 METHOD (seekTo,                       "seekTo",                       "(I)V") \
 METHOD (setAudioAttributes,           "setAudioAttributes",           "(Landroid/media/AudioAttributes;)V") \
 METHOD (setDataSource,                "setDataSource",                "(Landroid/content/Context;Landroid/net/Uri;)V") \
 METHOD (setDisplay,                   "setDisplay",                   "(Landroid/view/SurfaceHolder;)V") \
 METHOD (setOnBufferingUpdateListener, "setOnBufferingUpdateListener", "(Landroid/media/MediaPlayer$OnBufferingUpdateListener;)V") \
 METHOD (setOnCompletionListener,      "setOnCompletionListener",      "(Landroid/media/MediaPlayer$OnCompletionListener;)V") \
 METHOD (setOnErrorListener,           "setOnErrorListener",           "(Landroid/media/MediaPlayer$OnErrorListener;)V") \
 METHOD (setOnInfoListener,            "setOnInfoListener",            "(Landroid/media/MediaPlayer$OnInfoListener;)V") \
 METHOD (setOnPreparedListener,        "setOnPreparedListener",        "(Landroid/media/MediaPlayer$OnPreparedListener;)V") \
 METHOD (setOnSeekCompleteListener,    "setOnSeekCompleteListener",    "(Landroid/media/MediaPlayer$OnSeekCompleteListener;)V") \
 METHOD (setPlaybackParams,            "setPlaybackParams",            "(Landroid/media/PlaybackParams;)V") \
 METHOD (setVolume,                    "setVolume",                    "(FF)V") \
 METHOD (start,                        "start",                        "()V") \
 METHOD (stop,                         "stop",                         "()V")

DECLARE_JNI_CLASS_WITH_MIN_SDK (AndroidMediaPlayer, "android/media/MediaPlayer", 21)
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
 METHOD (constructor,            "<init>",                 "(Landroid/content/Context;Ljava/lang/String;)V") \
 METHOD (getController,          "getController",          "()Landroid/media/session/MediaController;") \
 METHOD (release,                "release",                "()V") \
 METHOD (setActive,              "setActive",              "(Z)V") \
 METHOD (setCallback,            "setCallback",            "(Landroid/media/session/MediaSession$Callback;)V") \
 METHOD (setFlags,               "setFlags",               "(I)V") \
 METHOD (setMediaButtonReceiver, "setMediaButtonReceiver", "(Landroid/app/PendingIntent;)V") \
 METHOD (setMetadata,            "setMetadata",            "(Landroid/media/MediaMetadata;)V") \
 METHOD (setPlaybackState,       "setPlaybackState",       "(Landroid/media/session/PlaybackState;)V") \
 METHOD (setPlaybackToLocal,     "setPlaybackToLocal",     "(Landroid/media/AudioAttributes;)V")

DECLARE_JNI_CLASS_WITH_MIN_SDK (AndroidMediaSession, "android/media/session/MediaSession", 21)
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
 METHOD (build,       "build",   "()Landroid/media/MediaMetadata;") \
 METHOD (constructor, "<init>",  "()V") \
 METHOD (putLong,     "putLong", "(Ljava/lang/String;J)Landroid/media/MediaMetadata$Builder;")

DECLARE_JNI_CLASS_WITH_MIN_SDK (AndroidMediaMetadataBuilder, "android/media/MediaMetadata$Builder", 21)
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
 METHOD (getSpeed, "getSpeed", "()F") \
 METHOD (setSpeed, "setSpeed", "(F)Landroid/media/PlaybackParams;")

DECLARE_JNI_CLASS_WITH_MIN_SDK (AndroidPlaybackParams, "android/media/PlaybackParams", 21)
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
 METHOD (getActions,       "getActions",       "()J") \
 METHOD (getErrorMessage,  "getErrorMessage",  "()Ljava/lang/CharSequence;") \
 METHOD (getPlaybackSpeed, "getPlaybackSpeed", "()F") \
 METHOD (getPosition,      "getPosition",      "()J") \
 METHOD (getState,         "getState",         "()I")

DECLARE_JNI_CLASS_WITH_MIN_SDK (AndroidPlaybackState, "android/media/session/PlaybackState", 21)
#undef JNI_CLASS_MEMBERS

#define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
 METHOD (build,           "build",           "()Landroid/media/session/PlaybackState;") \
 METHOD (constructor,     "<init>",          "()V") \
 METHOD (setActions,      "setActions",      "(J)Landroid/media/session/PlaybackState$Builder;") \
 METHOD (setErrorMessage, "setErrorMessage", "(Ljava/lang/CharSequence;)Landroid/media/session/PlaybackState$Builder;") \
 METHOD (setState,        "setState",        "(IJF)Landroid/media/session/PlaybackState$Builder;")

DECLARE_JNI_CLASS_WITH_MIN_SDK (AndroidPlaybackStateBuilder, "android/media/session/PlaybackState$Builder", 21)
#undef JNI_CLASS_MEMBERS

//==============================================================================
class MediaPlayerListener  : public AndroidInterfaceImplementer
{
public:
    struct Owner
    {
        virtual ~Owner() {}

        virtual void onPrepared (LocalRef<jobject>& mediaPlayer) = 0;
        virtual void onBufferingUpdate (LocalRef<jobject>& mediaPlayer, int progress) = 0;
        virtual void onSeekComplete (LocalRef<jobject>& mediaPlayer) = 0;
        virtual void onCompletion (LocalRef<jobject>& mediaPlayer) = 0;
        virtual bool onInfo (LocalRef<jobject>& mediaPlayer, int what, int extra) = 0;
        virtual bool onError (LocalRef<jobject>& mediaPlayer, int what, int extra) = 0;
    };

    MediaPlayerListener (Owner& ownerToUse) : owner (ownerToUse) {}

private:
    Owner& owner;

    jobject invoke (jobject proxy, jobject method, jobjectArray args) override
    {
        auto* env = getEnv();
        auto methodName = juce::juceString ((jstring) env->CallObjectMethod (method, JavaMethod.getName));

        int numArgs = args != nullptr ? env->GetArrayLength (args) : 0;

        if (methodName == "onPrepared" && numArgs == 1)
        {
            auto mediaPlayer = LocalRef<jobject> (env->GetObjectArrayElement (args, 0));

            owner.onPrepared (mediaPlayer);
            return nullptr;
        }

        if (methodName == "onCompletion" && numArgs == 1)
        {
            auto mediaPlayer = LocalRef<jobject> (env->GetObjectArrayElement (args, 0));

            owner.onCompletion (mediaPlayer);
            return nullptr;
        }

        if (methodName == "onInfo" && numArgs == 3)
        {
            auto mediaPlayer = LocalRef<jobject> (env->GetObjectArrayElement (args, 0));
            auto what        = LocalRef<jobject> (env->GetObjectArrayElement (args, 1));
            auto extra       = LocalRef<jobject> (env->GetObjectArrayElement (args, 2));

            auto whatInt  = (int) env->CallIntMethod (what, JavaInteger.intValue);
            auto extraInt = (int) env->CallIntMethod (extra, JavaInteger.intValue);

            auto res = owner.onInfo (mediaPlayer, whatInt, extraInt);
            return env->CallStaticObjectMethod (JavaBoolean, JavaBoolean.valueOf, (jboolean) res);
        }

        if (methodName == "onError" && numArgs == 3)
        {
            auto mediaPlayer = LocalRef<jobject> (env->GetObjectArrayElement (args, 0));
            auto what        = LocalRef<jobject> (env->GetObjectArrayElement (args, 1));
            auto extra       = LocalRef<jobject> (env->GetObjectArrayElement (args, 2));

            auto whatInt  = (int) env->CallIntMethod (what, JavaInteger.intValue);
            auto extraInt = (int) env->CallIntMethod (extra, JavaInteger.intValue);

            auto res = owner.onError (mediaPlayer, whatInt, extraInt);
            return env->CallStaticObjectMethod (JavaBoolean, JavaBoolean.valueOf, (jboolean) res);
        }

        if (methodName == "onSeekComplete" && numArgs == 1)
        {
            auto mediaPlayer = LocalRef<jobject> (env->GetObjectArrayElement (args, 0));

            owner.onSeekComplete (mediaPlayer);
            return nullptr;
        }

        if (methodName == "onBufferingUpdate" && numArgs == 2)
        {
            auto mediaPlayer = LocalRef<jobject> (env->GetObjectArrayElement (args, 0));

            auto progress    = LocalRef<jobject> (env->GetObjectArrayElement (args, 1));
            auto progressInt = (int) env->CallIntMethod (progress, JavaInteger.intValue);

            owner.onBufferingUpdate (mediaPlayer, progressInt);

            return nullptr;
        }

        return AndroidInterfaceImplementer::invoke (proxy, method, args);
    }
};

//==============================================================================
class AudioManagerOnAudioFocusChangeListener  : public AndroidInterfaceImplementer
{
public:
    struct Owner
    {
        virtual ~Owner() {}

        virtual void onAudioFocusChange (int changeType) = 0;
    };

    AudioManagerOnAudioFocusChangeListener (Owner& ownerToUse) : owner (ownerToUse) {}

private:
    Owner& owner;

    jobject invoke (jobject proxy, jobject method, jobjectArray args) override
    {
        auto* env = getEnv();
        auto methodName = juce::juceString ((jstring) env->CallObjectMethod (method, JavaMethod.getName));

        int numArgs = args != nullptr ? env->GetArrayLength (args) : 0;

        if (methodName == "onAudioFocusChange" && numArgs == 1)
        {
            auto changeType = LocalRef<jobject> (env->GetObjectArrayElement (args, 0));

            auto changeTypeInt = (int) env->CallIntMethod (changeType, JavaInteger.intValue);

            owner.onAudioFocusChange (changeTypeInt);
            return nullptr;
        }

        return AndroidInterfaceImplementer::invoke (proxy, method, args);
    }
};

//==============================================================================
struct VideoComponent::Pimpl
    : public AndroidViewComponent, private ActivityLifecycleCallbacks, private SurfaceHolderCallback
{
    Pimpl (VideoComponent& ownerToUse, bool)
        : owner (ownerToUse),
          mediaSession (*this)
       #if JUCE_SYNC_VIDEO_VOLUME_WITH_OS_MEDIA_VOLUME
        , systemVolumeListener (*this)
       #endif
    {
        // Video requires SDK version 21 or higher
        jassert (getAndroidSDKVersion() >= 21);

        setVisible (true);

        auto* env = getEnv();

        LocalRef<jobject> appContext (getAppContext());

        if (appContext != nullptr)
        {
            ActivityLifecycleCallbacks* callbacks = dynamic_cast<ActivityLifecycleCallbacks*> (this);

            activityLifeListener = GlobalRef (CreateJavaInterface (callbacks, "android/app/Application$ActivityLifecycleCallbacks"));
            env->CallVoidMethod (appContext.get(), AndroidApplication.registerActivityLifecycleCallbacks, activityLifeListener.get());
        }

        {
            LocalRef<jobject> surfaceView (env->NewObject (AndroidSurfaceView, AndroidSurfaceView.constructor, getAppContext().get()));
            LocalRef<jobject> holder (env->CallObjectMethod (surfaceView.get(), AndroidSurfaceView.getHolder));

            SurfaceHolderCallback* callbacks = dynamic_cast<SurfaceHolderCallback*> (this);
            surfaceHolderCallback = GlobalRef (CreateJavaInterface (callbacks, "android/view/SurfaceHolder$Callback"));
            env->CallVoidMethod (holder, AndroidSurfaceHolder.addCallback, surfaceHolderCallback.get());

            setView (surfaceView.get());
        }
    }

    ~Pimpl() override
    {
        auto* env = getEnv();

        if (surfaceHolderCallback != nullptr)
        {
            jobject view = reinterpret_cast<jobject> (getView());

            if (view != nullptr)
            {
                LocalRef <jobject> holder (env->CallObjectMethod (view, AndroidSurfaceView.getHolder));

                env->CallVoidMethod (holder, AndroidSurfaceHolder.removeCallback, surfaceHolderCallback.get());
                SurfaceHolderCallback::clear();
                surfaceHolderCallback.clear();
            }
        }

        if (activityLifeListener != nullptr)
        {
            env->CallVoidMethod (getAppContext().get(), AndroidApplication.unregisterActivityLifecycleCallbacks, activityLifeListener.get());
            ActivityLifecycleCallbacks::clear();
            activityLifeListener.clear();
        }
    }

    void loadAsync (const URL& url, std::function<void (const URL&, Result)> callback)
    {
        close();
        wasOpen = false;

        if (url.isEmpty())
        {
            jassertfalse;
            return;
        }

        if (! url.isLocalFile())
        {
            if (! isPermissionDeclaredInManifest ("android.permission.INTERNET"))
            {
                // In order to access videos from the Internet, the Internet permission has to be specified in
                // Android Manifest.
                jassertfalse;
                return;
            }
        }

        currentURL = url;

        jassert (callback != nullptr);

        loadFinishedCallback = std::move (callback);

        static constexpr jint visible = 0;
        getEnv()->CallVoidMethod ((jobject) getView(), AndroidView.setVisibility, visible);

        mediaSession.load (url);
    }

    void close()
    {
        if (! isOpen())
            return;

        mediaSession.closeVideo();

        static constexpr jint invisible = 4;
        getEnv()->CallVoidMethod ((jobject) getView(), AndroidView.setVisibility, invisible);
    }

    bool isOpen() const noexcept          { return mediaSession.isVideoOpen(); }
    bool isPlaying() const noexcept       { return mediaSession.isPlaying(); }

    void play()                           { mediaSession.play(); }
    void stop()                           { mediaSession.stop(); }

    void setPosition (double newPosition) { mediaSession.setPosition (newPosition); }
    double getPosition() const            { return mediaSession.getPosition(); }

    void setSpeed (double newSpeed)       { mediaSession.setSpeed (newSpeed); }
    double getSpeed() const               { return mediaSession.getSpeed(); }

    Rectangle<int> getNativeSize() const  { return mediaSession.getNativeSize(); }

    double getDuration() const            { return mediaSession.getDuration(); }

    void setVolume (float newVolume)      { mediaSession.setVolume (newVolume); }
    float getVolume() const               { return mediaSession.getVolume(); }

    File currentFile;
    URL currentURL;

private:
    //==============================================================================
    class MediaSession  : private AudioManagerOnAudioFocusChangeListener::Owner
    {
    public:
        MediaSession (Pimpl& ownerToUse)
            : owner (ownerToUse),
              sdkVersion (getAndroidSDKVersion()),
              audioAttributes (getAudioAttributes()),
              nativeMediaSession (LocalRef<jobject> (getEnv()->NewObject (AndroidMediaSession,
                                                                          AndroidMediaSession.constructor,
                                                                          getAppContext().get(),
                                                                          javaString ("JuceVideoMediaSession").get()))),
              mediaSessionCallback (createCallbackObject()),
              playbackStateBuilder (LocalRef<jobject> (getEnv()->NewObject (AndroidPlaybackStateBuilder,
                                                                            AndroidPlaybackStateBuilder.constructor))),
              controller (*this, LocalRef<jobject> (getEnv()->CallObjectMethod (nativeMediaSession,
                                                                                AndroidMediaSession.getController))),
              player (*this),
              audioManager (LocalRef<jobject> (getEnv()->CallObjectMethod (getAppContext().get(), AndroidContext.getSystemService,
                                                                           javaString ("audio").get()))),
              audioFocusChangeListener (*this),
              nativeAudioFocusChangeListener (GlobalRef (CreateJavaInterface (&audioFocusChangeListener,
                                                                              "android/media/AudioManager$OnAudioFocusChangeListener"))),
              audioFocusRequest (createAudioFocusRequestIfNecessary (sdkVersion, audioAttributes,
                                                                     nativeAudioFocusChangeListener))
        {
            auto* env = getEnv();

            env->CallVoidMethod (nativeMediaSession, AndroidMediaSession.setPlaybackToLocal, audioAttributes.get());
            env->CallVoidMethod (nativeMediaSession, AndroidMediaSession.setMediaButtonReceiver, nullptr);
            env->CallVoidMethod (nativeMediaSession, AndroidMediaSession.setCallback, mediaSessionCallback.get());
        }

        ~MediaSession() override
        {
            auto* env = getEnv();

            env->CallVoidMethod (nativeMediaSession, AndroidMediaSession.setCallback, nullptr);

            controller.stop();
            env->CallVoidMethod (nativeMediaSession, AndroidMediaSession.release);
        }

        bool isVideoOpen() const { return player.isVideoOpen(); }
        bool isPlaying() const   { return player.isPlaying(); }

        void load (const URL& url) { controller.load (url); }

        void closeVideo()
        {
            resetState();
            controller.closeVideo();
        }

        void setDisplay (const LocalRef<jobject>& surfaceHolder) { player.setDisplay (surfaceHolder); }

        void play() { controller.play(); }
        void stop() { controller.stop(); }

        void setPosition (double newPosition) { controller.setPosition (newPosition); }
        double getPosition() const            { return controller.getPosition(); }

        void setSpeed (double newSpeed)
        {
            playSpeedMult = newSpeed;

            // Calling non 0.0 speed on a paused player would start it...
            if (player.isPlaying())
            {
                player.setPlaySpeed (playSpeedMult);
                updatePlaybackState();
            }
        }

        double getSpeed() const              { return controller.getPlaySpeed(); }
        Rectangle<int> getNativeSize() const { return player.getVideoNativeSize(); }
        double getDuration() const           { return (double) player.getVideoDuration() / 1000.0; }

        void setVolume (float newVolume)
        {
           #if JUCE_SYNC_VIDEO_VOLUME_WITH_OS_MEDIA_VOLUME
            controller.setVolume (newVolume);
           #else
            player.setAudioVolume (newVolume);
           #endif
        }

        float getVolume() const
        {
           #if JUCE_SYNC_VIDEO_VOLUME_WITH_OS_MEDIA_VOLUME
            return controller.getVolume();
           #else
            return player.getAudioVolume();
           #endif
        }

        void storeState()
        {
            storedPlaybackState.clear();
            storedPlaybackState = GlobalRef (getCurrentPlaybackState());
        }

        void restoreState()
        {
            if (storedPlaybackState.get() == nullptr)
                return;

            auto* env = getEnv();

            auto pos = env->CallLongMethod (storedPlaybackState, AndroidPlaybackState.getPosition);
            setPosition ((double) pos / 1000.0);

            setSpeed (playSpeedMult);

            auto state = env->CallIntMethod (storedPlaybackState, AndroidPlaybackState.getState);

            if (state != PlaybackState::STATE_NONE && state != PlaybackState::STATE_STOPPED
                && state != PlaybackState::STATE_PAUSED && state != PlaybackState::STATE_ERROR)
            {
                play();
            }
        }

    private:
        struct PlaybackState
        {
            enum
            {
                STATE_NONE = 0,
                STATE_STOPPED = 1,
                STATE_PAUSED = 2,
                STATE_PLAYING = 3,
                STATE_FAST_FORWARDING = 4,
                STATE_REWINDING = 5,
                STATE_BUFFERING = 6,
                STATE_ERROR = 7,
                STATE_CONNECTING = 8,
                STATE_SKIPPING_TO_PREVIOUS = 9,
                STATE_SKIPPING_TO_NEXT = 10,
                STATE_SKIPPING_TO_QUEUE_ITEM = 11,
            };

            enum
            {
                ACTION_PAUSE              = 0x2,
                ACTION_PLAY               = 0x4,
                ACTION_PLAY_FROM_MEDIA_ID = 0x8000,
                ACTION_PLAY_PAUSE         = 0x200,
                ACTION_SEEK_TO            = 0x100,
                ACTION_STOP               = 0x1,
            };
        };

        //==============================================================================
        class Controller
        {
        public:
            Controller (MediaSession& ownerToUse, const LocalRef<jobject>& nativeControllerToUse)
                : owner (ownerToUse),
                  nativeController (GlobalRef (nativeControllerToUse)),
                  controllerTransportControls (LocalRef<jobject> (getEnv()->CallObjectMethod (nativeControllerToUse,
                                                                                              AndroidMediaController.getTransportControls))),
                  controllerCallback (createControllerCallbacks())
            {
                auto* env = getEnv();

                env->CallVoidMethod (nativeController, AndroidMediaController.registerCallback, controllerCallback.get());
            }

            ~Controller()
            {
                auto* env = getEnv();
                env->CallVoidMethod (nativeController, AndroidMediaController.unregisterCallback, controllerCallback.get());
            }

            void load (const URL& url)
            {
                // NB: would use playFromUri, but it was only introduced in API 23...
                getEnv()->CallVoidMethod (controllerTransportControls, AndroidMediaControllerTransportControls.playFromMediaId,
                                          javaString (url.toString (true)).get(), nullptr);
            }

            void closeVideo()
            {
                getEnv()->CallVoidMethod (controllerTransportControls, AndroidMediaControllerTransportControls.stop);
            }

            void play()
            {
                getEnv()->CallVoidMethod (controllerTransportControls, AndroidMediaControllerTransportControls.play);
            }

            void stop()
            {
                // NB: calling pause, rather than stop, because after calling stop, we would have to call load() again.
                getEnv()->CallVoidMethod (controllerTransportControls, AndroidMediaControllerTransportControls.pause);
            }

            void setPosition (double newPosition)
            {
                auto seekPos = static_cast<jlong> (newPosition * 1000);

                getEnv()->CallVoidMethod (controllerTransportControls, AndroidMediaControllerTransportControls.seekTo, seekPos);
            }

            double getPosition() const
            {
                auto* env = getEnv();

                auto playbackState = LocalRef<jobject> (env->CallObjectMethod (nativeController, AndroidMediaController.getPlaybackState));

                if (playbackState != nullptr)
                    return (double) env->CallLongMethod (playbackState, AndroidPlaybackState.getPosition) / 1000.0;

                return 0.0;
            }

            double getPlaySpeed() const
            {
                auto* env = getEnv();

                auto playbackState = LocalRef<jobject> (env->CallObjectMethod (nativeController, AndroidMediaController.getPlaybackState));

                if (playbackState != nullptr)
                    return (double) env->CallFloatMethod (playbackState, AndroidPlaybackState.getPlaybackSpeed);

                return 1.0;
            }

            void setVolume (float newVolume)
            {
                auto* env = getEnv();

                auto playbackInfo = LocalRef<jobject> (env->CallObjectMethod (nativeController, AndroidMediaController.getPlaybackInfo));

                auto maxVolume = env->CallIntMethod (playbackInfo, AndroidMediaControllerPlaybackInfo.getMaxVolume);

                auto targetVolume = jmin (jint ((float) maxVolume * newVolume), maxVolume);

                static constexpr jint flagShowUI = 1;
                env->CallVoidMethod (nativeController, AndroidMediaController.setVolumeTo, targetVolume, flagShowUI);
            }

            float getVolume() const
            {
                auto* env = getEnv();

                auto playbackInfo = LocalRef<jobject> (env->CallObjectMethod (nativeController, AndroidMediaController.getPlaybackInfo));

                auto maxVolume = (int) (env->CallIntMethod (playbackInfo, AndroidMediaControllerPlaybackInfo.getMaxVolume));
                auto curVolume = (int) (env->CallIntMethod (playbackInfo, AndroidMediaControllerPlaybackInfo.getCurrentVolume));

                return static_cast<float> (curVolume) / (float) maxVolume;
            }

        private:
            MediaSession& owner;

            GlobalRef nativeController;
            GlobalRef controllerTransportControls;
            GlobalRef controllerCallback;
            bool wasPlaying = false;
            bool wasPaused = true;

            //==============================================================================
            void stateChanged (jobject playbackState)
            {
                JUCE_VIDEO_LOG ("MediaSessionController::playbackStateChanged()");

                if (playbackState == nullptr)
                    return;

                auto state = getEnv()->CallIntMethod (playbackState, AndroidPlaybackState.getState);

                static constexpr jint statePaused  = 2;
                static constexpr jint statePlaying = 3;

                if (wasPlaying == false && state == statePlaying)
                    owner.playbackStarted();
                else if (wasPaused == false && state == statePaused)
                    owner.playbackStopped();

                wasPlaying = state == statePlaying;
                wasPaused  = state == statePaused;
            }

            //==============================================================================
            #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
                METHOD (constructor, "<init>", "(J)V")                  \
                CALLBACK (generatedCallback<&Controller::audioInfoChanged>,     "mediaControllerAudioInfoChanged",      "(JLandroid/media/session/MediaController$PlaybackInfo;)V") \
                CALLBACK (generatedCallback<&Controller::metadataChanged>,      "mediaControllerMetadataChanged",       "(JLandroid/media/MediaMetadata;)V") \
                CALLBACK (generatedCallback<&Controller::playbackStateChanged>, "mediaControllerPlaybackStateChanged",  "(JLandroid/media/session/PlaybackState;)V") \
                CALLBACK (generatedCallback<&Controller::sessionDestroyed>,     "mediaControllerSessionDestroyed",      "(J)V")

            DECLARE_JNI_CLASS_WITH_BYTECODE (AndroidMediaControllerCallback, "com/rmsl/juce/MediaControllerCallback", 21, MediaSessionByteCode)
           #undef JNI_CLASS_MEMBERS

            LocalRef<jobject> createControllerCallbacks()
            {
                return LocalRef<jobject> (getEnv()->NewObject (AndroidMediaControllerCallback,
                                                               AndroidMediaControllerCallback.constructor,
                                                               reinterpret_cast<jlong> (this)));
            }

            //==============================================================================
            // MediaSessionController callbacks
            static void audioInfoChanged (JNIEnv*, [[maybe_unused]] Controller& t, [[maybe_unused]] jobject playbackInfo)
            {
                JUCE_VIDEO_LOG ("MediaSessionController::audioInfoChanged()");
            }

            static void metadataChanged (JNIEnv*, [[maybe_unused]] Controller&, [[maybe_unused]] jobject metadata)
            {
                JUCE_VIDEO_LOG ("MediaSessionController::metadataChanged()");
            }

            static void playbackStateChanged (JNIEnv*, Controller& t, [[maybe_unused]] jobject state)
            {
                t.stateChanged (state);
            }

            static void sessionDestroyed (JNIEnv*, [[maybe_unused]] Controller& t)
            {
                JUCE_VIDEO_LOG ("MediaSessionController::sessionDestroyed()");
            }
        };

        //==============================================================================
        class Player   : private MediaPlayerListener::Owner
        {
        public:
            Player (MediaSession& ownerToUse)
                : owner (ownerToUse),
                  mediaPlayerListener (*this),
                  nativeMediaPlayerListener (GlobalRef (CreateJavaInterface (&mediaPlayerListener,
                                                                             getNativeMediaPlayerListenerInterfaces())))

            {}

            void setDisplay (const LocalRef<jobject>& surfaceHolder)
            {
                if (surfaceHolder == nullptr)
                {
                    videoSurfaceHolder.clear();

                    if (nativeMediaPlayer.get() != nullptr)
                        getEnv()->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setDisplay, nullptr);

                    return;
                }

                videoSurfaceHolder = GlobalRef (surfaceHolder);

                if (nativeMediaPlayer.get() != nullptr)
                    getEnv()->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setDisplay, videoSurfaceHolder.get());
            }

            void load (const LocalRef<jstring>& mediaId, [[maybe_unused]] const LocalRef<jobject>& extras)
            {
                closeVideo();

                auto* env = getEnv();

                nativeMediaPlayer = GlobalRef (LocalRef<jobject> (env->NewObject (AndroidMediaPlayer, AndroidMediaPlayer.constructor)));

                currentState = State::idle;

                auto uri = LocalRef<jobject> (env->CallStaticObjectMethod (AndroidUri, AndroidUri.parse, mediaId.get()));
                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setDataSource, getAppContext().get(), uri.get());

                if (jniCheckHasExceptionOccurredAndClear())
                {
                    owner.errorOccurred ("Could not find video under path provided (" + juceString (mediaId) + ")");
                    return;
                }

                currentState = State::initialised;

                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setOnBufferingUpdateListener,   nativeMediaPlayerListener.get());
                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setOnCompletionListener, nativeMediaPlayerListener.get());
                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setOnErrorListener,      nativeMediaPlayerListener.get());
                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setOnInfoListener,       nativeMediaPlayerListener.get());
                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setOnPreparedListener,   nativeMediaPlayerListener.get());
                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setOnSeekCompleteListener,   nativeMediaPlayerListener.get());

                if (videoSurfaceHolder != nullptr)
                    env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setDisplay, videoSurfaceHolder.get());

                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.prepareAsync);

                currentState = State::preparing;
            }

            void closeVideo()
            {
                if (nativeMediaPlayer.get() == nullptr)
                    return;

                auto* env = getEnv();

                if (getCurrentStateInfo().canCallStop)
                    env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.stop);

                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.release);
                nativeMediaPlayer.clear();

                currentState = State::end;
            }

            bool isVideoOpen() const noexcept
            {
                return currentState == State::prepared || currentState == State::started
                    || currentState == State::paused || currentState == State::complete;
            }

            int getPlaybackStateFlag() const noexcept { return getCurrentStateInfo().playbackStateFlag; }
            int getAllowedActions()    const noexcept { return getCurrentStateInfo().allowedActions; }

            jlong getVideoDuration() const
            {
                if (! getCurrentStateInfo().canCallGetVideoDuration)
                    return 0;

                return getEnv()->CallIntMethod (nativeMediaPlayer, AndroidMediaPlayer.getDuration);
            }

            Rectangle<int> getVideoNativeSize() const
            {
                if (! getCurrentStateInfo().canCallGetVideoHeight)
                {
                    jassertfalse;
                    return {};
                }

                auto* env = getEnv();

                auto width  = (int) env->CallIntMethod (nativeMediaPlayer, AndroidMediaPlayer.getVideoWidth);
                auto height = (int) env->CallIntMethod (nativeMediaPlayer, AndroidMediaPlayer.getVideoHeight);

                return Rectangle<int> (0, 0, width, height);
            }

            void play()
            {
                if (! getCurrentStateInfo().canCallStart)
                {
                    jassertfalse;
                    return;
                }

                auto* env = getEnv();

                // Perform a potentially pending volume setting
                if (! exactlyEqual (lastAudioVolume, std::numeric_limits<float>::min()))
                    env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setVolume, (jfloat) lastAudioVolume, (jfloat) lastAudioVolume);

                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.start);

                currentState = State::started;
            }

            void pause()
            {
                if (! getCurrentStateInfo().canCallPause)
                {
                    jassertfalse;
                    return;
                }

                getEnv()->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.pause);

                currentState = State::paused;
            }

            bool isPlaying() const
            {
                return getCurrentStateInfo().isPlaying;
            }

            void setPlayPosition (jint newPositionMs)
            {
                if (! getCurrentStateInfo().canCallSeekTo)
                {
                    jassertfalse;
                    return;
                }

                getEnv()->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.seekTo, (jint) newPositionMs);
            }

            jint getPlayPosition() const
            {
                if (! getCurrentStateInfo().canCallGetCurrentPosition)
                    return 0.0;

                return getEnv()->CallIntMethod (nativeMediaPlayer, AndroidMediaPlayer.getCurrentPosition);
            }

            void setPlaySpeed (double newSpeed)
            {
                if (! getCurrentStateInfo().canCallSetPlaybackParams)
                {
                    jassertfalse;
                    return;
                }

                auto* env = getEnv();

                auto playbackParams = LocalRef<jobject> (env->CallObjectMethod (nativeMediaPlayer, AndroidMediaPlayer.getPlaybackParams));
                LocalRef<jobject> (env->CallObjectMethod (playbackParams, AndroidPlaybackParams.setSpeed, (jfloat) newSpeed));
                env->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setPlaybackParams, playbackParams.get());

                if (jniCheckHasExceptionOccurredAndClear())
                {
                    // MediaPlayer can't handle speed provided!
                    jassertfalse;
                }
            }

            double getPlaySpeed() const
            {
                if (! getCurrentStateInfo().canCallGetPlaybackParams)
                    return 0.0;

                auto* env = getEnv();

                auto playbackParams = LocalRef<jobject> (env->CallObjectMethod (nativeMediaPlayer, AndroidMediaPlayer.getPlaybackParams));
                return (double) env->CallFloatMethod (playbackParams, AndroidPlaybackParams.getSpeed);
            }

            void setAudioVolume (float newVolume)
            {
                if (! getCurrentStateInfo().canCallSetVolume)
                {
                    jassertfalse;
                    return;
                }

                lastAudioVolume = jlimit (0.0f, 1.0f, newVolume);

                if (nativeMediaPlayer.get() != nullptr)
                    getEnv()->CallVoidMethod (nativeMediaPlayer, AndroidMediaPlayer.setVolume, (jfloat) lastAudioVolume, (jfloat) lastAudioVolume);
            }

            float getAudioVolume() const
            {
                // There is NO getVolume() in MediaPlayer, so the value returned here can be incorrect!
                return lastAudioVolume;
            }

        private:
            //==============================================================================
            struct StateInfo
            {
                int playbackStateFlag = 0, allowedActions = 0;

                bool isPlaying, canCallGetCurrentPosition, canCallGetVideoDuration,
                        canCallGetVideoHeight, canCallGetVideoWidth, canCallGetPlaybackParams,
                        canCallPause, canCallPrepare, canCallSeekTo, canCallSetAudioAttributes,
                        canCallSetDataSource, canCallSetPlaybackParams, canCallSetVolume,
                        canCallStart, canCallStop;
            };

            enum class State
            {
                idle, initialised, preparing, prepared, started, paused, stopped, complete, error, end
            };

            static constexpr StateInfo stateInfos[] = {
                /* idle */
                {PlaybackState::STATE_NONE, PlaybackState::ACTION_PLAY_FROM_MEDIA_ID,
                            false, true, false, true, true, false, false, false, false, true,
                            true,  false, true, false, false},
                /* initialised */
                {PlaybackState::STATE_NONE, 0, // NB: could use action prepare, but that's API 24 onwards only
                            false, true, false, true, true, true, false, true, false, true,
                            false,  true, true, false, false},
                /* preparing */
                {PlaybackState::STATE_BUFFERING, 0,
                            false, false, false, false, false, true, false, false, false, false,
                            false,  false, false, false, false},
                /* prepared */
                {PlaybackState::STATE_PAUSED,
                            PlaybackState::ACTION_PLAY | PlaybackState::ACTION_PLAY_PAUSE | PlaybackState::ACTION_PLAY_FROM_MEDIA_ID | PlaybackState::ACTION_STOP | PlaybackState::ACTION_SEEK_TO,
                            false, true, true, true, true, true, false, false, true, true,
                            false, true, true, true, true},
                /* started */
                {PlaybackState::STATE_PLAYING,
                            PlaybackState::ACTION_PAUSE | PlaybackState::ACTION_PLAY_PAUSE | PlaybackState::ACTION_SEEK_TO | PlaybackState::ACTION_STOP | PlaybackState::ACTION_PLAY_FROM_MEDIA_ID,
                            true, true, true, true, true, true, true, false, true, true,
                            false, true, true, true, true},
                /* paused */
                {PlaybackState::STATE_PAUSED,
                            PlaybackState::ACTION_PLAY | PlaybackState::ACTION_PLAY_PAUSE | PlaybackState::ACTION_SEEK_TO | PlaybackState::ACTION_STOP | PlaybackState::ACTION_PLAY_FROM_MEDIA_ID,
                            false, true, true, true, true, true, true, false, true, true,
                            false, true, true, true, true},
                /* stopped */
                {PlaybackState::STATE_STOPPED,
                            PlaybackState::ACTION_PLAY_FROM_MEDIA_ID,
                            false, true, true, true, true, true, false, true, false, true,
                            false, false, true, false, true},
                /* complete */
                {PlaybackState::STATE_PAUSED,
                            PlaybackState::ACTION_SEEK_TO | PlaybackState::ACTION_STOP | PlaybackState::ACTION_PLAY_FROM_MEDIA_ID,
                            false, true, true, true, true, true, true, false, true, true,
                            false, true, true, true, true},
                /* error */
                {PlaybackState::STATE_ERROR,
                            PlaybackState::ACTION_PLAY_FROM_MEDIA_ID,
                            false, false, false, false, false, false, false, false, false, false,
                            false, false, false, false, false},
                /* end */
                {PlaybackState::STATE_NONE,
                            PlaybackState::ACTION_PLAY_FROM_MEDIA_ID,
                            false, false, false, false, false, false, false, false, false, false,
                            false, false, false, false, false}
            };

            StateInfo getCurrentStateInfo() const noexcept             { return stateInfos[static_cast<int> (currentState)]; }

            //==============================================================================
            MediaSession& owner;
            GlobalRef nativeMediaPlayer;

            MediaPlayerListener mediaPlayerListener;
            GlobalRef nativeMediaPlayerListener;

            float lastAudioVolume = std::numeric_limits<float>::min();

            GlobalRef videoSurfaceHolder;

            State currentState = State::idle;

            //==============================================================================
            void onPrepared ([[maybe_unused]] LocalRef<jobject>& mediaPlayer) override
            {
                JUCE_VIDEO_LOG ("MediaPlayer::onPrepared()");

                currentState = State::prepared;

                owner.playerPrepared();
            }

            void onBufferingUpdate ([[maybe_unused]] LocalRef<jobject>& mediaPlayer, int progress) override
            {
                owner.playerBufferingUpdated (progress);
            }

            void onSeekComplete ([[maybe_unused]] LocalRef<jobject>& mediaPlayer) override
            {
                JUCE_VIDEO_LOG ("MediaPlayer::onSeekComplete()");

                owner.playerSeekCompleted();
            }

            void onCompletion ([[maybe_unused]] LocalRef<jobject>& mediaPlayer) override
            {
                JUCE_VIDEO_LOG ("MediaPlayer::onCompletion()");

                currentState = State::complete;

                owner.playerPlaybackCompleted();
            }

            enum
            {
                MEDIA_INFO_UNKNOWN               = 1,
                MEDIA_INFO_VIDEO_RENDERING_START = 3,
                MEDIA_INFO_VIDEO_TRACK_LAGGING   = 700,
                MEDIA_INFO_BUFFERING_START       = 701,
                MEDIA_INFO_BUFFERING_END         = 702,
                MEDIA_INFO_NETWORK_BANDWIDTH     = 703,
                MEDIA_INFO_BAD_INTERLEAVING      = 800,
                MEDIA_INFO_NOT_SEEKABLE          = 801,
                MEDIA_INFO_METADATA_UPDATE       = 802,
                MEDIA_INFO_AUDIO_NOT_PLAYING     = 804,
                MEDIA_INFO_VIDEO_NOT_PLAYING     = 805,
                MEDIA_INFO_UNSUPPORTED_SUBTITE   = 901,
                MEDIA_INFO_SUBTITLE_TIMED_OUT    = 902
            };

            bool onInfo ([[maybe_unused]] LocalRef<jobject>& mediaPlayer, int what, [[maybe_unused]] int extra) override
            {
                JUCE_VIDEO_LOG ("MediaPlayer::onInfo(), infoCode: " + String (what) + " (" + infoCodeToString (what) + ")"
                                + ", extraCode: " + String (extra));

                if (what == MEDIA_INFO_BUFFERING_START)
                    owner.playerBufferingStarted();
                else if (what == MEDIA_INFO_BUFFERING_END)
                    owner.playerBufferingEnded();

                return true;
            }

            static String infoCodeToString (int code)
            {
                switch (code)
                {
                    case MEDIA_INFO_UNKNOWN:               return "Unknown";
                    case MEDIA_INFO_VIDEO_RENDERING_START: return "Rendering start";
                    case MEDIA_INFO_VIDEO_TRACK_LAGGING:   return "Video track lagging";
                    case MEDIA_INFO_BUFFERING_START:       return "Buffering start";
                    case MEDIA_INFO_BUFFERING_END:         return "Buffering end";
                    case MEDIA_INFO_NETWORK_BANDWIDTH:     return "Network bandwidth info available";
                    case MEDIA_INFO_BAD_INTERLEAVING:      return "Bad interleaving";
                    case MEDIA_INFO_NOT_SEEKABLE:          return "Video not seekable";
                    case MEDIA_INFO_METADATA_UPDATE:       return "Metadata updated";
                    case MEDIA_INFO_AUDIO_NOT_PLAYING:     return "Audio not playing";
                    case MEDIA_INFO_VIDEO_NOT_PLAYING:     return "Video not playing";
                    case MEDIA_INFO_UNSUPPORTED_SUBTITE:   return "Unsupported subtitle";
                    case MEDIA_INFO_SUBTITLE_TIMED_OUT:    return "Subtitle timed out";
                    default:                               return "";
                }
            }

            bool onError ([[maybe_unused]] LocalRef<jobject>& mediaPlayer, int what, int extra) override
            {
                auto errorMessage = errorCodeToString (what);
                auto extraMessage = errorCodeToString (extra);

                if (extraMessage.isNotEmpty())
                    errorMessage << ", " << extraMessage;

                JUCE_VIDEO_LOG ("MediaPlayer::onError(), errorCode: " + String (what) + " (" + errorMessage + ")"
                                + ", extraCode: " + String (extra) + " (" + extraMessage + ")");

                currentState = State::error;

                owner.errorOccurred (errorMessage);
                return true;
            }

            static String errorCodeToString (int code)
            {
                enum
                {
                    MEDIA_ERROR_UNSUPPORTED                        = -1010,
                    MEDIA_ERROR_MALFORMED                          = -1007,
                    MEDIA_ERROR_IO                                 = -1004,
                    MEDIA_ERROR_TIMED_OUT                          = -110,
                    MEDIA_ERROR_UNKNOWN                            = 1,
                    MEDIA_ERROR_SERVER_DIED                        = 100,
                    MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK = 200
                };

                switch (code)
                {
                    case MEDIA_ERROR_UNSUPPORTED:                        return "Unsupported bitstream";
                    case MEDIA_ERROR_MALFORMED:                          return "Malformed bitstream";
                    case MEDIA_ERROR_IO:                                 return "File/Network I/O error";
                    case MEDIA_ERROR_TIMED_OUT:                          return "Timed out";
                    case MEDIA_ERROR_UNKNOWN:                            return "Unknown error";
                    case MEDIA_ERROR_SERVER_DIED:                        return "Media server died (playback restart required)";
                    case MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK: return "Video container not valid for progressive playback";
                    default:                                             return "";
                }
            }

            //==============================================================================
            static StringArray getNativeMediaPlayerListenerInterfaces()
            {
                #define IFPREFIX "android/media/MediaPlayer$"

                return { IFPREFIX "OnCompletionListener", IFPREFIX "OnErrorListener",
                         IFPREFIX "OnInfoListener", IFPREFIX "OnPreparedListener",
                         IFPREFIX "OnBufferingUpdateListener", IFPREFIX "OnSeekCompleteListener"
                };

                #undef IFPREFIX
            }
        };

        //==============================================================================
        Pimpl& owner;
        int sdkVersion;

        GlobalRef audioAttributes;
        GlobalRef nativeMediaSession;
        GlobalRef mediaSessionCallback;
        GlobalRef playbackStateBuilder;

        Controller controller;
        Player player;

        GlobalRef audioManager;
        AudioManagerOnAudioFocusChangeListener audioFocusChangeListener;
        GlobalRef nativeAudioFocusChangeListener;
        GlobalRef audioFocusRequest;

        GlobalRef storedPlaybackState;

        bool pendingSeekRequest = false;

        bool playerBufferingInProgress = false;
        bool usesBuffering = false;
        SparseSet<int> bufferedRegions;

        double playSpeedMult = 1.0;
        bool hasAudioFocus = false;

        //==============================================================================
        #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
            METHOD (constructor, "<init>", "(J)V")                      \
            CALLBACK (generatedCallback<&MediaSession::pauseCallback>,           "mediaSessionPause",           "(J)V") \
            CALLBACK (generatedCallback<&MediaSession::playCallback>,            "mediaSessionPlay",            "(J)V") \
            CALLBACK (generatedCallback<&MediaSession::playFromMediaIdCallback>, "mediaSessionPlayFromMediaId", "(JLjava/lang/String;Landroid/os/Bundle;)V") \
            CALLBACK (generatedCallback<&MediaSession::seekToCallback>,          "mediaSessionSeekTo",          "(JJ)V") \
            CALLBACK (generatedCallback<&MediaSession::stopCallback>,            "mediaSessionStop",            "(J)V")

        DECLARE_JNI_CLASS_WITH_MIN_SDK (AndroidMediaSessionCallback, "com/rmsl/juce/MediaSessionCallback", 21)
        #undef JNI_CLASS_MEMBERS

        LocalRef<jobject> createCallbackObject()
        {
            return LocalRef<jobject> (getEnv()->NewObject (AndroidMediaSessionCallback,
                                                           AndroidMediaSessionCallback.constructor,
                                                           reinterpret_cast<jlong> (this)));
        }

        //==============================================================================
        // MediaSession callbacks
        static void pauseCallback (JNIEnv*, MediaSession& t)
        {
            JUCE_VIDEO_LOG ("MediaSession::pauseCallback()");
            t.player.pause();
            t.updatePlaybackState();
            t.abandonAudioFocus();
        }

        static void playCallback (JNIEnv* env, MediaSession& t)
        {
            JUCE_VIDEO_LOG ("MediaSession::playCallback()");

            t.requestAudioFocus();

            if (! t.hasAudioFocus)
            {
                t.errorOccurred ("Application has been denied audio focus. Try again later.");
                return;
            }

            env->CallVoidMethod (t.nativeMediaSession, AndroidMediaSession.setActive, true);

            t.player.play();
            t.setSpeed (t.playSpeedMult);
            t.updatePlaybackState();
        }

        static void playFromMediaIdCallback (JNIEnv* env, MediaSession& t, jstring mediaId, jobject extras)
        {
            JUCE_VIDEO_LOG ("MediaSession::playFromMediaIdCallback()");

            t.player.load (LocalRef<jstring> ((jstring) env->NewLocalRef (mediaId)), LocalRef<jobject> (env->NewLocalRef (extras)));
            t.updatePlaybackState();
        }

        static void seekToCallback (JNIEnv*, MediaSession& t, jlong pos)
        {
            JUCE_VIDEO_LOG ("MediaSession::seekToCallback()");

            t.pendingSeekRequest = true;
            t.player.setPlayPosition ((jint) pos);
            t.updatePlaybackState();
        }

        static void stopCallback (JNIEnv* env, MediaSession& t)
        {
            JUCE_VIDEO_LOG ("MediaSession::stopCallback()");

            env->CallVoidMethod (t.nativeMediaSession, AndroidMediaSession.setActive, false);

            t.player.closeVideo();
            t.updatePlaybackState();

            t.abandonAudioFocus();

            t.owner.closeVideoFinished();
        }

        //==============================================================================
        bool isSeekInProgress() const noexcept
        {
            if (pendingSeekRequest)
                return true;

            if (! usesBuffering)
                return false;

            // NB: player sometimes notifies us about buffering, but only for regions that
            // were previously buffered already. For buffering happening for the first time,
            // we don't get such notification...
            if (playerBufferingInProgress)
                return true;

            auto playPos = player.getPlayPosition();
            auto durationMs = player.getVideoDuration();
            auto playPosPercent = (int) (100.0 * playPos / static_cast<double> (durationMs));

            // NB: assuming the playback will start roughly when there is 5% of content loaded...
            return ! bufferedRegions.containsRange (Range<int> (playPosPercent, jmin (101, playPosPercent + 5)));
        }

        void updatePlaybackState()
        {
            getEnv()->CallVoidMethod (nativeMediaSession, AndroidMediaSession.setPlaybackState, getCurrentPlaybackState().get());
        }

        LocalRef<jobject> getCurrentPlaybackState()
        {
            static constexpr int bufferingState = 6;

            auto playbackStateFlag = isSeekInProgress() ? bufferingState : player.getPlaybackStateFlag();
            auto playPos = player.getPlayPosition();
            auto playSpeed = player.getPlaySpeed();
            auto allowedActions = player.getAllowedActions();

            auto* env = getEnv();

            LocalRef<jobject> (env->CallObjectMethod (playbackStateBuilder, AndroidPlaybackStateBuilder.setState,
                                                      (jint) playbackStateFlag, (jlong) playPos, (jfloat) playSpeed));

            LocalRef<jobject> (env->CallObjectMethod (playbackStateBuilder, AndroidPlaybackStateBuilder.setActions, (jint) allowedActions));

            return LocalRef<jobject> (env->CallObjectMethod (playbackStateBuilder, AndroidPlaybackStateBuilder.build));
        }

        //==============================================================================
        void playerPrepared()
        {
            resetState();

            updateMetadata();

            owner.loadFinished();
        }

        void playerBufferingStarted() { playerBufferingInProgress = true; }
        void playerBufferingEnded()   { playerBufferingInProgress = false; }

        void playerBufferingUpdated (int progress)
        {
            usesBuffering = true;

            updatePlaybackState();

            auto playPos = player.getPlayPosition();
            auto durationMs = player.getVideoDuration();
            auto playPosPercent = (int) (100.0 * playPos / static_cast<double> (durationMs));

            bufferedRegions.addRange (Range<int> (playPosPercent, progress + 1));

            String ranges;

            for (auto& r : bufferedRegions.getRanges())
                ranges << "[" << r.getStart() << "%, " << r.getEnd() - 1 << "%] ";

            JUCE_VIDEO_LOG ("Buffering status update, seek pos: " + String (playPosPercent) + "%, buffered regions: " + ranges);
        }

        void playerSeekCompleted()
        {
            pendingSeekRequest = false;
            updatePlaybackState();
        }

        void playerPlaybackCompleted()
        {
            player.pause();
            abandonAudioFocus();

            pendingSeekRequest = true;
            player.setPlayPosition (0);
            updatePlaybackState();
        }

        void updateMetadata()
        {
            auto* env = getEnv();

            auto metadataBuilder = LocalRef<jobject> (env->NewObject (AndroidMediaMetadataBuilder,
                                                                      AndroidMediaMetadataBuilder.constructor));

            auto durationMs = player.getVideoDuration();

            auto jDurationKey = javaString ("android.media.metadata.DURATION");
            LocalRef<jobject> (env->CallObjectMethod (metadataBuilder,
                                                      AndroidMediaMetadataBuilder.putLong,
                                                      jDurationKey.get(),
                                                      (jlong) durationMs));

            auto jNumTracksKey = javaString ("android.media.metadata.NUM_TRACKS");
            LocalRef<jobject> (env->CallObjectMethod (metadataBuilder,
                                                      AndroidMediaMetadataBuilder.putLong,
                                                      jNumTracksKey.get(),
                                                      (jlong) 1));

            env->CallVoidMethod (nativeMediaSession, AndroidMediaSession.setMetadata,
                                 env->CallObjectMethod (metadataBuilder, AndroidMediaMetadataBuilder.build));
        }

        void errorOccurred (const String& errorMessage)
        {
            auto* env = getEnv();

            // Propagate error to session controller(s) and ...
            LocalRef<jobject> (env->CallObjectMethod (playbackStateBuilder, AndroidPlaybackStateBuilder.setErrorMessage,
                                                      javaString (errorMessage).get()));

            auto state = LocalRef<jobject> (env->CallObjectMethod (playbackStateBuilder, AndroidPlaybackStateBuilder.build));
            env->CallVoidMethod (nativeMediaSession, AndroidMediaSession.setPlaybackState, state.get());

            // ...also notify JUCE side client
            owner.errorOccurred (errorMessage);
        }

        //==============================================================================
        static LocalRef<jobject> createAudioFocusRequestIfNecessary (int sdkVersion, const GlobalRef& audioAttributes,
                                                                     const GlobalRef& nativeAudioFocusChangeListener)
        {
            if (sdkVersion < 26)
                return LocalRef<jobject>();

            auto* env = getEnv();

            auto requestBuilderClass = LocalRef<jclass> (env->FindClass ("android/media/AudioFocusRequest$Builder"));

            static jmethodID constructor = env->GetMethodID (requestBuilderClass, "<init>", "(I)V");
            static jmethodID buildMethod = env->GetMethodID (requestBuilderClass, "build", "()Landroid/media/AudioFocusRequest;");
            static jmethodID setAudioAttributesMethod = env->GetMethodID (requestBuilderClass, "setAudioAttributes",
                                                                          "(Landroid/media/AudioAttributes;)Landroid/media/AudioFocusRequest$Builder;");
            static jmethodID setOnAudioFocusChangeListenerMethod = env->GetMethodID (requestBuilderClass, "setOnAudioFocusChangeListener",
                                                                                     "(Landroid/media/AudioManager$OnAudioFocusChangeListener;)Landroid/media/AudioFocusRequest$Builder;");

            static constexpr jint audioFocusGain = 1;

            auto requestBuilder = LocalRef<jobject> (env->NewObject (requestBuilderClass, constructor, audioFocusGain));
            LocalRef<jobject> (env->CallObjectMethod (requestBuilder, setAudioAttributesMethod, audioAttributes.get()));
            LocalRef<jobject> (env->CallObjectMethod (requestBuilder, setOnAudioFocusChangeListenerMethod, nativeAudioFocusChangeListener.get()));

            return LocalRef<jobject> (env->CallObjectMethod (requestBuilder, buildMethod));
        }

        void requestAudioFocus()
        {
            static constexpr jint audioFocusGain = 1;
            static constexpr jint streamMusic = 3;
            static constexpr jint audioFocusRequestGranted = 1;

            jint result = audioFocusRequestGranted;

            if (sdkVersion >= 26)
            {
                static jmethodID requestAudioFocusMethod = getEnv()->GetMethodID (AndroidAudioManager, "requestAudioFocus",
                                                                                  "(Landroid/media/AudioFocusRequest;)I");

                result = getEnv()->CallIntMethod (audioManager, requestAudioFocusMethod, audioFocusRequest.get());
            }
            else
            {
                result = getEnv()->CallIntMethod (audioManager, AndroidAudioManager.requestAudioFocus,
                                                  nativeAudioFocusChangeListener.get(), streamMusic, audioFocusGain);
            }

            hasAudioFocus = result == audioFocusRequestGranted;
        }

        void abandonAudioFocus()
        {
            if (! hasAudioFocus)
                return;

            static constexpr jint audioFocusRequestGranted = 1;

            jint result = audioFocusRequestGranted;

            if (sdkVersion >= 26)
            {
                static jmethodID abandonAudioFocusMethod = getEnv()->GetMethodID (AndroidAudioManager, "abandonAudioFocusRequest",
                                                                                  "(Landroid/media/AudioFocusRequest;)I");

                result = getEnv()->CallIntMethod (audioManager, abandonAudioFocusMethod, audioFocusRequest.get());
            }
            else
            {
                result = getEnv()->CallIntMethod (audioManager, AndroidAudioManager.abandonAudioFocus,
                                                   nativeAudioFocusChangeListener.get());
            }

            // NB: granted in this case means "granted to change the focus to abandoned"...
            hasAudioFocus = result != audioFocusRequestGranted;
        }

        void onAudioFocusChange (int changeType) override
        {
            static constexpr jint audioFocusGain = 1;

            if (changeType == audioFocusGain)
                JUCE_VIDEO_LOG ("Audio focus gained");
            else
                JUCE_VIDEO_LOG ("Audio focus lost");

            if (changeType != audioFocusGain)
            {
                if (isPlaying())
                {
                    JUCE_VIDEO_LOG ("Received a request to abandon audio focus. Stopping playback...");
                    stop();
                }

                abandonAudioFocus();
            }
        }

        //==============================================================================
        void playbackStarted()
        {
            owner.playbackStarted();
        }

        void playbackStopped()
        {
            owner.playbackStopped();
        }

        //==============================================================================
        void resetState()
        {
            usesBuffering = false;
            bufferedRegions.clear();
            playerBufferingInProgress = false;

            pendingSeekRequest = false;

            playSpeedMult = 1.0;
            hasAudioFocus = false;
        }

        //==============================================================================
        static LocalRef<jobject> getAudioAttributes()
        {
            // Video requires SDK version 21 or higher
            jassert (getAndroidSDKVersion() >= 21);

            auto* env = getEnv();

            auto audioAttribsBuilder = LocalRef<jobject> (env->NewObject (AndroidAudioAttributesBuilder,
                                                                          AndroidAudioAttributesBuilder.constructor));
            static constexpr jint contentTypeMovie = 3;
            static constexpr jint usageMedia = 1;

            LocalRef<jobject> (env->CallObjectMethod (audioAttribsBuilder, AndroidAudioAttributesBuilder.setContentType, contentTypeMovie));
            LocalRef<jobject> (env->CallObjectMethod (audioAttribsBuilder, AndroidAudioAttributesBuilder.setUsage, usageMedia));

            return LocalRef<jobject> (env->CallObjectMethod (audioAttribsBuilder, AndroidAudioAttributesBuilder.build));
        }
    };

   #if JUCE_SYNC_VIDEO_VOLUME_WITH_OS_MEDIA_VOLUME
    //==============================================================================
    class SystemVolumeListener
    {
    public:
        SystemVolumeListener (Pimpl& ownerToUse)
            : owner (ownerToUse),
              nativeObserver (createCallbackObject())
        {
            setEnabled (true);
        }

        ~SystemVolumeListener()
        {
            setEnabled (false);
        }
    private:
        Pimpl& owner;
        GlobalRef nativeObserver;

        //==============================================================================
        #define JNI_CLASS_MEMBERS(METHOD, STATICMETHOD, FIELD, STATICFIELD, CALLBACK) \
            METHOD (constructor, "<init>",     "(Landroid/app/Activity;J)V") \
            METHOD (setEnabled,  "setEnabled", "(Z)V")                  \
            CALLBACK (generatedCallback<&SystemVolumeListener::systemVolumeChanged>, "mediaSessionSystemVolumeChanged", "(J)V")

        DECLARE_JNI_CLASS_WITH_MIN_SDK (SystemVolumeObserver, "com/rmsl/juce/SystemVolumeObserver", 21)
        #undef JNI_CLASS_MEMBERS


        LocalRef<jobject> createCallbackObject()
        {
            return LocalRef<jobject> (getEnv()->NewObject (SystemVolumeObserver,
                                                           SystemVolumeObserver.constructor,
                                                           getCurrentActivity().get(),
                                                           reinterpret_cast<jlong> (this)));
        }
    public:
        void setEnabled (bool shouldBeEnabled)
        {
            getEnv()->CallVoidMethod (nativeObserver, SystemVolumeObserver.setEnabled, shouldBeEnabled);

            // Send first notification instantly to ensure sync.
            if (shouldBeEnabled)
                systemVolumeChanged (getEnv(), *this);
        }

    private:
        //==============================================================================
        static void systemVolumeChanged (JNIEnv*, SystemVolumeListener& t)
        {
            MessageManager::callAsync ([weakThis = WeakReference<SystemVolumeListener> { &t }]
                                       {
                                           if (weakThis == nullptr)
                                               return;

                                           NullCheckedInvocation::invoke (weakThis->owner.owner.onGlobalMediaVolumeChanged);
                                       });

        }

        JUCE_DECLARE_WEAK_REFERENCEABLE (SystemVolumeListener)
    };

    //==============================================================================
    VideoComponent& owner;

    MediaSession mediaSession;
    GlobalRef activityLifeListener;
   #if JUCE_SYNC_VIDEO_VOLUME_WITH_OS_MEDIA_VOLUME
    SystemVolumeListener systemVolumeListener;
   #endif
    GlobalRef surfaceHolderCallback;

    std::function<void (const URL&, Result)> loadFinishedCallback;

    bool wasOpen = false;

    //==============================================================================
    void loadFinished()
    {
        owner.resized();

        if (loadFinishedCallback != nullptr)
        {
            loadFinishedCallback (currentURL, Result::ok());
            loadFinishedCallback = nullptr;
        }
    }

    void closeVideoFinished()
    {
        owner.resized();
    }

    void errorOccurred (const String& errorMessage)
    {
        NullCheckedInvocation::invoke (owner.onErrorOccurred, errorMessage);
    }

    void playbackStarted()
    {
        NullCheckedInvocation::invoke (owner.onPlaybackStarted);
    }

    void playbackStopped()
    {
        NullCheckedInvocation::invoke (owner.onPlaybackStopped);
    }

    //==============================================================================
    void surfaceChanged (LocalRef<jobject> holder, int /*format*/, int /*width*/, int /*height*/) override
    {
        mediaSession.setDisplay (holder);
    }

    void surfaceDestroyed (LocalRef<jobject> /*holder*/) override
    {
        mediaSession.setDisplay (LocalRef<jobject>());
    }

    void surfaceCreated (LocalRef<jobject> /*holder*/) override
    {
    }

    //==============================================================================
    void onActivityPaused (jobject) override
    {
        wasOpen = isOpen();

        if (! wasOpen)
            return;

        JUCE_VIDEO_LOG ("App paused, releasing media player...");

        mediaSession.storeState();
        mediaSession.closeVideo();

       #if JUCE_SYNC_VIDEO_VOLUME_WITH_OS_MEDIA_VOLUME
        systemVolumeListener.setEnabled (false);
       #endif
    }

    void onActivityResumed (jobject) override
    {
        if (! wasOpen)
            return;

        JUCE_VIDEO_LOG ("App resumed, restoring media player...");

        loadAsync (currentURL, [this] (const URL&, Result r)
                   {
                       if (r.wasOk())
                           mediaSession.restoreState();
                   });

       #if JUCE_SYNC_VIDEO_VOLUME_WITH_OS_MEDIA_VOLUME
        systemVolumeListener.setEnabled (true);
       #endif
    }

    //==============================================================================
   #endif

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (Pimpl)
};

//==============================================================================
constexpr VideoComponent::Pimpl::MediaSession::Player::StateInfo VideoComponent::Pimpl::MediaSession::Player::stateInfos[];
